Pre heat oven to 350 F, grease and line a large loaf pan (or 3 small loaf pans) with paper. In a large bowl: whisk all the wet ingredients: sweet potato, oil, maple syrup, coconut sugar: mix with a whisk. In another bowl: sift all the dry ingredients: flours, salt and baking soda. Add to wet ingredients and use a plastic spatula to finish mixing. Pour batter into prepared pan. Sprinkle pecan moscovado crumble on top.Bake for aprox 50 mins or until a toothpick comes out clean. You may need to lower the baking temperature to 340 F so it doesn’t over brown. Towards the end of baking add the chocolate chunks. Let cool, un mold. Cool completely and cut with a serrated knife.